Declare OTLP Logs Beta (#1741)
Declare OTLP Logs Beta (#1741)

The Log SIG discussed and made a decision to declare Log data model
and Log part of OTLP Beta.

(See SIG meeting notes here https://docs.google.com/document/d/1cX5fWXyWqVVzYHSFUymYUfWxUK5hT97gc23w595LmdM/edit#heading=h.28y76as82bvu)
open-telemetry/opentelemetry-specification,open-telemetry/opentelemetry-specification